Welcome and thanks for asking your question. My name is***** am a licensed veterinarian. I am not set up to make a live call. But, I am happy to answer your question on this thread. First I need to ask you a few questions so that I can be well informed and give you the best advice. 1- What is the name or active ingredient of the ant killer? 2- How much does Lucy weigh? 3- How long has it been since she ate it?